Wonders in the sky -- The northern lights -- What causes the northern lights? -- Exploring the aurora -- Trolls, crystals, and other stories -- Science in Arendelle -- Where can I see the lights? -- Cold places -- When to watch the lights -- What causes the seasons? -- Daylight and nightfall -- Late-night stargazing -- The stars in the sky -- Navigating by the stars -- Discovering the planets -- The moon -- Eclipses -- Comets and meteors -- Best viewing conditions -- Goodbye for now!